diff --git a/Gemfile.lock b/Gemfile.lock
index a1ab75e..c200efd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
       stringio
     public_suffix (6.0.1)
     racc (1.8.1)
-    rack (3.1.13)
+    rack (3.1.18)
     rack-session (2.1.0)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)